在packer配置文件中设置aws的可切换角色

要在Packer配置文件中设置AWS可切换角色，您需要使用以下JSON代码：

{
  "builders": [{
    "type": "amazon-ebs",
    "access_key": "{{env `AWS_ACCESS_KEY_ID`}}",
    "secret_key": "{{env `AWS_SECRET_ACCESS_KEY`}}",
    "region": "us-east-1",
    "source_ami_filter": {
      "filters": {
        "virtualization-type": "hvm",
        "name": "ubuntu/images/*ubuntu-xenial-16.04-amd64-server-*",
        "root-device-type": "ebs"
      },
      "most_recent": true,
      "owners": ["099720109477"]
    },
    "instance_type": "t2.micro",
    "ssh_username": "ubuntu",
    "ami_name": "ubuntu-xenial-16.04-amd64-server-{{timestamp}}",
    "run_tags": {
      "Name": "Packer Builder"
    },
    "assume_role": {
      "role_arn": "arn:aws:iam::123456789012:role/myrole",
      "session_name": "packer"
    }
  }]
}

在上面的代码中，您需要将 "role_arn" 值更改为 AWS 中您希望使用的角色 ARN。然后，Packer 将使用此角色进行部署。